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The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
A New and Easy Introduction to the Mathematics: Containing. A system of ... - Page 70
by Ira Wanzer - 1831 - 396 pages

## The Description and Use of the Globes, and the Orrery: To which is Prefixed ...

Joseph Harris - Astronomical models - 1732 - 236 pages
...Pole is placed, and the opppfite one is the Southern Hemifphere. The Aftronomers divide all Circles into 360 equal Parts called 'Degrees, each Degree...Parts called Minutes, each Minute into 60 Seconds, &c. But befides this Divifion into Degrees, the Equir noftial is commonly divided into 24 equal Parts...

## An essay on mechanical geometry, explanatory of a set of models

Benjamin Donne - 1796 - 120 pages
...calculating the proportion which angles bear to each other, fuppofe the circumference of every circle to be divided into 360 equal parts, called Degrees...equal parts, called minutes ; each minute into 60 equal parts named feconds, &c. Ar. B. Sometimes the circumference of a circle is called a circle; as...

## A Complete System of Practical Arithmetic, with Various Branches in the ...

William Taylor (teacher of the mathematics.) - Arithmetic - 1800 - 556 pages
...a' femi-eircle • half the diameter is called the Radius. 8. The circumference of every circle is divided into 360 equal parts called Degrees ; each degree into 60 equal parts, called Minutes ; and each minute into 60 equal parts, called Seconds, &c. Any part of the the circumference is called...

## Mathematics: Compiled from the Best Authors and Intended to be the ..., Volume 1

Mathematics - 1801 - 446 pages
...the two sides, that, which stands at the angular point, is rend in the middle. C 56. The 39° 5 6. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 minutes, each minute into do seconds, and so on. Hence a semicircle contains...

## A Summary of Geography and History, Both Ancient and Modern ...: With an ...

Alexander Adam - Classical dictionaries - 1802 - 914 pages
...radii of the fame circle are always equal to one another. The circumference of every circle is fuppofed to be divided into 360 equal parts, called degrees ; each degree into 60 mi* ņutes \ each minute into 60 feccnds ; and thefe into thirds, fourths, &c. greater or Ąefs according...

## A System of Geometry and Trigonometry: Together with a Treatise on Surveying ...

Abel Flint - Surveying - 1804 - 226 pages
...the Centre ; and it divides the Circle into two equal parts, called Semicircles ; as AB or DE. 14. The. Circumference of every Circle is supposed to be Divided into 360 equal parts, called Degrees ; and each Degree into 60 equal parts, called Minutes ; and each Minute into 60 equal parts, called...

## The shipwright's vade-mecum [by D. Steel].

David Steel - History - 1805 - 392 pages
...centre to the circumference of a circle, is called a Radius. All the radii of the same circle are equal. The circumference of every circle is supposed to be divided into 360 parts, called degrees; each degree into 60 equal parts, called minutei; and each minute into 60 equal...

## A Treatise on Plane and Spherical Trigonometry: With Their Most Useful ...

John Bonnycastle - Trigonometry - 1806 - 464 pages
...by an arc of a circle contained between its two legs, and having the angular point for its centre. Every circle is supposed to be divided into 360 equal...equal parts, called minutes ; each minute into 60 equal parts, called seconds ; &c. So that a semicircle, or half the circumference, contains 1 80 degrees...